diff --git a/system-variables.md b/system-variables.md
index 983966ef3b3b0..8df555d02f06f 100644
--- a/system-variables.md
+++ b/system-variables.md
@@ -331,15 +331,14 @@ This variable is an alias for [`last_insert_id`](#last_insert_id).
- Default value: `OFF`
- This variable indicates whether [TiDB Binlog](https://docs.pingcap.com/tidb/stable/tidb-binlog-overview) is used.
-### max_allowed_packet
+### max_allowed_packet New in v6.1.0
- Scope: SESSION | GLOBAL
- Persists to cluster: Yes
-- Type: Integer
- Default value: `67108864`
-- Range: `[1024, 1073741824]`
-- Unit: Bytes
-- The maximum size of a packet for the MySQL protocol.
+- Range: `[1024, 1073741824]`. The value should be an integer multiple of 1024. If the value is not divisible by 1024, a warning will be prompted and the value will be rounded down. For example, when the value is set to 1025, the actual value in TiDB is 1024.
+- The maximum packet size allowed by the server and the client in one transmission of packets, in bytes.
+- This variable is compatible with MySQL.
### max_connections
@@ -397,15 +396,6 @@ mysql> SHOW GLOBAL VARIABLES LIKE 'max_prepared_stmt_count';
1 row in set (0.00 sec)
```
-### max_allowed_packet New in v6.1.0
-
-- Scope: SESSION | GLOBAL
-- Persists to cluster: Yes
-- Default value: `67108864`
-- Range: `[1024, 1073741824]`. The value should be an integer multiple of 1024. If the value is not divisible by 1024, a warning will be prompted and the value will be rounded down. For example, when the value is set to 1025, the actual value in TiDB is 1024.
-- The maximum packet size allowed by the server and the client in one transmission of packets, in bytes.
-- This variable is compatible with MySQL.
-
### plugin_dir
- Scope: GLOBAL